Superman: The Animated Series – Littlebighead

Mr. Mxyptlk gets into trouble with the rulers of his planet when he enlists
Bizarro’s help to create havoc on Earth.

Media by Bird Boy
Review by Bird Boy

Voices:
Tim Daly as Superman/Clark Kent/Bizarro
Dana Delany as Lois Lane
Gilbert Gottfried as Mxyzptlk
Jennifer Hale as Gsptisnz
Joanna Cassidy as Maggie Sawyer
Susanne Blakeslee as Teacher
Frank Welker as Krypto
Corey Burton as Stand Owner

Back to the episode at hand, "Little Big Head Man" puts Bizarro with
Mxyzptlk in a excellent story line–delivering fights, funnies and the usual Superman episode goodness in a great package.

After Bizarro finishes protecting his "world" for another day, he retires to his own Fortress of Solitude to converse with his "replicas" of Lois, Luthor and Superman. After he plays with Kyrpto for a bit, he hears a voice, who later turns out to be Mxy, only he's on Lois's
"body". Mxy was still hurting after Superman had humiliated him in "Mxyzpixilated", so he turned the ever-clueless Bizarro against Superman and Lois, stating they were making fun of him behind his back.

Aside from the fact this episode really served no purpose in the end, it, like I said earlier, was a great humor relief to watch after we had some more serious episodes.